CN203067061U

CN203067061U - Gasoline engine exhaust silencer

Info

Publication number: CN203067061U
Application number: CN 201320068213
Authority: CN
Inventors: 宋良永; 王睿
Original assignee: Zhejiang Industry and Trade Vocational College
Current assignee: Zhejiang Industry and Trade Vocational College
Priority date: 2013-02-01
Filing date: 2013-02-01
Publication date: 2013-07-17
Anticipated expiration: 2023-02-01

Abstract

The utility model relates to a gasoline engine exhaust silencer. The gasoline engine exhaust silencer comprises an air inlet pipe, an exhaust pipe and a silencer cylinder body, wherein the inner cavity of the silencer cylinder body is divided into a first expansion chamber, a second expansion chamber and a third expansion chamber in the air inlet direction by two baffles; the exhaust end of the air inlet pipe stretches into and is communicated with the third expansion chamber; the second expansion chamber and the third expansion chamber are communicated through a first perforated hush pipe; the first expansion chamber and the second expansion chamber are communicated through a second perforated hush pipe; and the air inlet end of the exhaust pipe stretches into and is communicated with the first expansion chamber. Compared with the prior art, the gasoline engine exhaust silencer provided by the utility model is provided with three expansion chambers, so that air flow can be fully buffered; and through the setting of the air flowing sequence of the three expansion chambers, the air flow can crash the inner walls of the expansion chambers repeatedly, so that noise elimination effect can be improved.

Description

The petrol engine exhaust silencer

Technical field

The utility model relates to the exhaust emissions silencing equipment, is specifically related to a kind of petrol engine exhaust silencer.

Background technique

Silencing apparatus is to stop sound transmission and a kind of device of allowing air-flow to pass through, is the important measures of eliminating air power noise.

As shown in Figure 1, existing petrol engine exhaust silencer generally includes silencer cylinder, is separated into three expansion chamber arranged side by side through dividing plate with holes in the silencer cylinder, suction tude and outlet pipe are plugged in respectively in the expansion chamber at two, and gas three expansion chamber of flowing through are successively carried out noise elimination noise reduction; The silencing apparatus gas flowing path of this structure is short, the noise elimination weak effect.

Summary of the invention

At the deficiency that prior art exists, the purpose of this utility model is to provide a kind of gas path length of flowing through, abundant resonant silencing, the effective petrol engine exhaust silencer of eliminating the noise.

For achieving the above object, the utility model provides following technological scheme: a kind of petrol engine exhaust silencer, include suction tude, outlet pipe and silencer cylinder, described silencer cylinder inner chamber is separated to form first expansion chamber along the gas airintake direction through two demarcation strips, second expansion chamber and the 3rd expansion chamber, it is characterized in that: the exhaust end of described suction tude stretches in the 3rd expansion chamber, and be communicated with the 3rd expansion chamber, described second expansion chamber is communicated with through first hush pipe with holes with the 3rd expansion chamber, first expansion chamber is communicated with through second hush pipe with holes with second expansion chamber, the inlet end of described outlet pipe stretches in first expansion chamber, and is communicated with first expansion chamber.

Further be set to: described silencer cylinder comprises inner core, urceolus, front cover and rear end cover, is placed in the urceolus in the described inner core, and front cover and rear end cover are arranged at the two ends of urceolus respectively, and suction tude and outlet pipe are stretched in the silencer cylinder by front cover.

Further be set to again: be provided with glass fibre layer between described inner core and the urceolus.

Further be set to: described glass fibre layer thickness is 1 ~ 2mm again.

Further be set to again: the exhaust end end face sealing of described suction tude, the inlet end end face sealing of outlet pipe, the exhaust end end face sealing of described first hush pipe with holes and second hush pipe with holes.

By adopting technique scheme, the beneficial effects of the utility model are: 3 expansion chamber are set, and by the setting to 3 buffer chamber overcurrent orders, air-flow are repeatedly bumped with chamber wall, air-flow is fully cushioned, increase the noise elimination effect; In further technological scheme, also be provided with glass fibre layer between inner core and the urceolus, further increase the noise elimination effect, and have effect of heat insulation.

Below in conjunction with accompanying drawing the utility model is further described.

Description of drawings

Fig. 1 is the utility model background technique structural representation;

Fig. 2 is the utility model specific embodiment structural representation.

Embodiment

Referring to accompanying drawing 1, accompanying drawing 2, the disclosed a kind of petrol engine exhaust silencer of the utility model, include suction tude 2, outlet pipe 3 and silencer cylinder 1, described silencer cylinder comprises inner core 13, urceolus 14, front cover 15 and rear end cover 16, be placed in the urceolus 14 in the described inner core 13, front cover 15 and rear end cover 16 are arranged at the two ends of urceolus 14 respectively, and suction tude 2 and outlet pipe 3 are stretched in the silencer cylinder 1 by front cover 15; Described silencer cylinder 1 inner chamber is separated to form first expansion chamber 10, second expansion chamber 11 and the 3rd expansion chamber 12 along the gas airintake direction through two demarcation strips 4; The exhaust end of described suction tude 2 stretches in the 3rd expansion chamber 12, and be communicated with the 3rd expansion chamber 12, the exhaust end end face of suction tude 2 is close to rear end cover 16 sealings, the pipeline section that suction tude 2 is positioned at the 3rd expansion chamber 12 is provided with aperture, when the frequency spectrum of air-flow during through small holes, jet noise will be shifted to high frequency or ultra-high frequency, audible sound composition in the frequency spectrum is obviously reduced, thereby reduce interference and injury to the people; Described second expansion chamber 11 is communicated with through first hush pipe 5 with holes with the 3rd expansion chamber 12, first hush pipe 5 with holes is fixedly mounted on the dividing plate 4, first hush pipe 5 with holes is positioned at second expansion chamber 11, which is provided with aperture, and the exhaust end end face of first hush pipe 5 with holes is close on the dividing plate and seals; Described first expansion chamber 10 is communicated with through second hush pipe 6 with holes with second expansion chamber 11, second hush pipe 6 with holes is positioned at first expansion chamber 10, it is provided with aperture, the exhaust end end face of second hush pipe 6 with holes is close to sealing on the front cover 15, the inlet end of described outlet pipe 3 stretches in first expansion chamber 10, and be communicated with first expansion chamber 10, the inlet end end face of outlet pipe 3 is close to sealing on the dividing plate 4.

For further improving erasure effect, be provided with glass fibre layer 17 between described inner core 13 and the urceolus 14; The glass fibre layer thickness is 1 ~ 2mm.Glass fibre layer has sound-absorbing noise elimination effect, and has effect of heat insulation.

Claims

1. petrol engine exhaust silencer, include suction tude, outlet pipe and silencer cylinder, described silencer cylinder inner chamber is separated to form first expansion chamber along the gas airintake direction through two demarcation strips, second expansion chamber and the 3rd expansion chamber, it is characterized in that: the exhaust end of described suction tude stretches in the 3rd expansion chamber, and be communicated with the 3rd expansion chamber, described second expansion chamber is communicated with through first hush pipe with holes with the 3rd expansion chamber, first expansion chamber is communicated with through second hush pipe with holes with second expansion chamber, the inlet end of described outlet pipe stretches in first expansion chamber, and is communicated with first expansion chamber.

2. petrol engine exhaust silencer according to claim 1, it is characterized in that: described silencer cylinder comprises inner core, urceolus, front cover and rear end cover, be placed in the urceolus in the described inner core, front cover and rear end cover are arranged at the two ends of urceolus respectively, and suction tude and outlet pipe are stretched in the silencer cylinder by front cover.

3. petrol engine exhaust silencer according to claim 2 is characterized in that: be provided with glass fibre layer between described inner core and the urceolus.

4. petrol engine exhaust silencer according to claim 3, it is characterized in that: described glass fibre layer thickness is 1 ~ 2mm.

5. according to claim 1 or 2 or 3 or 4 described petrol engine exhaust silencers, it is characterized in that: the exhaust end end face sealing of described suction tude, the inlet end end face sealing of outlet pipe, the exhaust end end face sealing of described first hush pipe with holes and second hush pipe with holes.